Oxidative conversion of methane to CO and H2 over Pt or Pd containing alkaline and rare earth oxide catalysts

被引：35

作者：

Choudhary, VR ^{[1
]}

Prabhakar, B ^{[1
]}

Rajput, AM ^{[1
]}

Mamman, AS ^{[1
]}

机构：

[1] Natl Chem Lab, Div Chem Engn, Poona 411008, Maharashtra, India

来源：

FUEL | 1998年 / 77卷 / 13期

关键词：

oxidative conversion of methane to CO and H-2; Pt-MgO; Pd-MgO; Pt-CaO; Pd-CaO; Pt rare earth oxides; Pd rare earth oxides; hydrogen chemisorption;

D O I：

10.1016/S0016-2361(98)00063-5

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A number of Pt (1.0 wt%) and Pd (1.0 wt%) containing alkaline earth oxide (namely, MgO and CaO) and rare earth oxide (namely, La2O3, Pr6O11, Nd2O3, Sm2O3, Gd2O3, Dy2O3 and Er2O3) catalysts have been compared for their performance in the oxidative conversion of methane to CO and H-2 at 700 and 800 degrees C and at very low contact time [GHSV = 5.0 ( +/- 0.2) X 10(5) cm(3). g(-1) . h(-1)]. The catalysts are characterized by their specific surface area and H-2 chemisorption at 40 degrees C. Among the Pt- and Pd-containing catalysts, the best performance is shown by Pt/Gd2O3 and Pd/Sm2O3, respectively. These catalysts show high selectivity for CO but low selectivity for hydrogen due to reverse water gas shift reaction. Since alkaline and rare earth oxides are basic in nature, they act not only as a support for dispersing noble metals but also play a significant role in deciding the activity/selectivity of the Pt- or Pd-containing catalysts. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1477 / 1481

页数：5

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